What this breaker is and what it protects
The Siemens 3VA1116-4ED46-0AB0 is a 4-pole IEC frame 160 molded-case circuit breaker with a 36 kA breaking capacity at 415 V (class S). It's built for line protection with a TM210 thermal-magnetic trip unit — fixed overload protection at 160 A (Ir = 160 A) and fixed short-circuit protection at 10× In (Ii = 10 × In). That means the thermal element handles sustained overloads up to 160 A, and the magnetic element trips instantaneously at 1600 A.
This breaker uses clamp (box lug) terminals on both line and load sides — no screw pressure-plate, so torque the connection to the manufacturer's spec for the cable size. The 4-pole body occupies the same DIN-rail footprint as the 3-pole version; just account for the extra pole width when laying out the enclosure backplate.